Conveying device



April 1942. MAURER 2278352 CONVEYING DEVICE Original Filed D90. 13, 19392 Sheets-Sheet 1 INVENTOR GOTTFRlEU MAURER CONVEYING DEVICE April 7,1942. MAURER 2,278,552

Original Filed Dec. 15, 1939 2 Sheets-Sheet 2 \NVENTOR GOTTFRIED MAURERPatented Apr. 7, 1942 1 CONVEYING DEVICE Gottfried Maui-er, Zurich,Switzerland, assignor to the firm A. Miiller & Cie. Maschinenfabrik undEisengiesserei Aktiengesellschaft, Brugg, Switzerland, a joint-stockcompany of Switzerland I Original application December 13, 1939, SerialNo. 309,099. Divided and this application Sep- 1 tember 9, 1940, SerialNo. 356,090. In Switzerland November 3, 1939 I (or. 198-219) Claims.

This application is a division of application Ser. No. 309,099 filedDecember 13, 1939, and relates to a conveying device comprising opposedgroups of bars moving forward andbackward and toward and away from oneanother thereby gripping and carrying forward the goods to be conveyed.It is preferably used for working and dressing wood-pieces, e. g. fortreating plywoodplates and veneers.

An object of the invention is to provide suitable driving meansconnecting the supporting means of the opposed groups of bars and movingthe opposed groups toward and away from each other and to control theoperation of the driving means 83 (on the left side in Fig. 3) haveV-shaped guide faces. Between the standards I0 two con- Veying beds arearranged, which can be displaced in. a vertical directionwith regard toeach other by means of spindles 80. The lower bed consists of two groupsof bars 84, 85 and the upper bed of two groups of bars 86, 81. The barsof each group of the upper and lower bed are disposed in such a wayvthat each bar of a group lies between two bars 'of the other group. Thebars of eachzgroup are attached to two cross girders, eachlying betweenthe raceways 92 and B3. The bars 84 of the lower bed are secured to thecross girders 88, 89 and the bars by the forward and backward motion ofthe op- 85 to the girders 90,. 9I. In a like manner the posed groups.bars 80 of the upper bedare mounted on girders In a preferred embodimentthese driving means 92, 93 and the bars 81 on girders 94, 95. are rightand lefthand threaded spindles. Stops Rollers 95, 91 of the girdersengage the raceon the opposed groups of bars strike, in the ways 83, 82along which the-girders are moved course of the forward and backwardmotion of to and fro when the cams I6, I! rotate. In order the groups,against crank arms secured to said to allow the groups of bars to bedriven by the spindles, thus rotating these latter. cams I6, 11, levers98, 99. are mounted on the Another object is to provide slidesconstituting shaft I2 with allowancefor oscillating and are saidsupporting means, these slides engaging pressed against the cams 71, ISwith the aid of guides on the machine frameand having racesprings I00,IOI' respectively. Bolts I04 of bearways on which suitable members, e.g. rollers, ings I02, I03 enter slots of the lower end of the mounted onthe groups, run forward and backlevers 98, 99. The bearings I03 aremounted ward. on bars 80 of one group and the bearings I02 Other objectsand features will be apparent as on bars 81 of the other group of theupper conthe following description proceeds, reference be- 0 veying bed.ing had to the accompanying drawings, in which Pins I48 and I49 of theouter upper bars en- Fig. 1 is a longitudinal section of an embodigageslots I50, I'5I of plates I52 and I53 atment, taken on line II of tachedto the lower outer bars. If, therefore, Fig. 2, which is a plan view;the groups of bars 86, 8! of the upper conveying Fig. 3 is a front viewof this embodiment and bed are reciprocatorily moved by means of theFig. 4 is a section taken on line II of Fig. 2, cams I6, 1! and springsIOI, I00 respectively, on an enlarged scale. these upper groups carrythe lower groups along The box-shaped standards 10 are held togetherwith the help of said pins M8, I49 and plates at the bottom by thestruts II and at the top I52 and I53. From this it follows that lower bythe rods I2 and 13. These standards serve and upper bars 84, (85, 81respectively) facing to carry a cam shaft I l driven by the gear wheel15 and provided with two pairs of cams I6, 11 displaced in relation toeach other, whose manner of action will be shown later on.

Two vertical guide pieces 78 of the same kind, on which slides I9 moveupand downwards, are provided on each of the standards I0. The slidesare driven by spindles 80 each with aright handed thread at one end anda left handed thread at the other end. These threads engage those oflateral lugs 8I passing through broad slots provided on the walls of theguide pieces 78. Each of the slides 19 has a horizontal race-way 82, 83respectively. The race-ways 82 (on the right side in Fig. 3) have planeand the Ways each other move in the same direction at the same time, butthe, groups 84, 86 and 85, 81, owing to the mutual position of the camsI6, TI on shaft I4, move in opposite directions to each other. For thepurposev of rotating the spindles 89 to and fro at the same angle oneach reciprocating movement of the bar groups,.each of the lower crossgirders 88, 89, 90, 9| comprises two adjustable stops IIO, II Icooperating on each reciprocating movement with a crank arm II2 securedtothe lower end of the spindles80. Owing to the fact that the ends ofeach spindle are provided with right and left hand threads, thisrotation to and fro causes the upper and lower bars of the same group torecede from of a group, e. g. the bars 85, 81 attached to the,cross-girders 90, 94 and SI, 95, coming fromthe left, have reached theposition immediately preceding that where the stops I Io'attached to the9 I strike against the: corresponding= crank arms II2, they are still'raised-from one.

girders Q0,

another and can receive the goods.- Assoon as these stops IIO strikeagainst the crank levers I I2, which happens simultaneously at both endsof all the cross girders of the, same" group of bars the spindles rotateand the upper and. lower bars in question begin to move toward oneanother. The goods are not wholly gripped till the end of thespindle-rotation, i. e. till the bars 85 and 8'I'are in their. right.dead center. This dead; center position'is shown in Figures 1 and 3 forthe crosst-girders 90, 94 and-9|, 95, i. e;, for the bars 85, 81.Nowrthe bars 85, 87, together with the goods, move to the left, untilthe stops I I I attached to the girders; 53;. 9| drive the: spindlcswiththe aid of. the corresponding crank arms H2 in the; otherdirection,whereby the bars 85, 81 of thegroup incquestion move away from oneanother. rotation, thenuppersand lower bars 81 and 85 are in their leftdead center-which is shown in Fig. l but for b'arsBB" and of the othergroup. Now the bars 85, 81 have releasedthe goods and in their openposition move to the right, and

approach'one another atthe end of said right hand motion as alreadyexplained.

The position of the cams 16,1! inrelation to each other is such'that thesecond group, consisting, of the bars 84, 86, moves to the right withthe bars raised from one another, while the first group with the bars85, .81 engaging the goods, moves to the left, i. e:, the cams I5, IIare displaced 180 in relation to each other (Figs. 1 and 3). In this waythe conveying of the goods is effected.

It is understood that alsomore than two bar groups might be provided.

While this embodiment of the invention has been illustrated anddescribed in such detail as to enable any one skilled in the art topractise the invention, nevertheless it is to be understood that theinvention is not'to belimited to any of the details disclosed, but,instead, it will be understood that the invention embraces suchembodiments of the broad. idea as fallv within the scope of thesubjoinedclaims, it being obvious that various changes may-be madeWithout departing from the spirit of the invention.

What I claim is:

In a conveyingdevice comprising opposed groups of bars, suitablesupporting means for said groups, adaptedto move toward and away fromone another, suitable operating means for said groups whereby twoopposed groups are caused to move forward and backward, and right andlefthandthreaded spindles connecting the supporting means of two opposedgroups, said spindles being adapted to be controlled by the forward andbackward motion of said two opposed groups and to move said two opposedgroups toward and away from each other.

2. Ina conveying devicecomprising opposed groups of bars, amachine-frame, guidepieces on said machine frame, slides-engaging saidguide At the: end: of this spindlepieces, raceways on said slides,members on said groups, adapted to run forward and backward on saidraceways, suitable operating means for said groups whereby the opposedroups are caused to move-forward and backward, and right and left handthreaded rotatable spindles connecting said slides, said spindles beingadapted to be .controlled by the forward and backward motion of opposedgroups and to move said groups towardand away from each other.

3; In.a conveying device comprising opposed groups of bars, a machineframe, guide pieces onsaid" machine frame, slides engaging said guidepieces, raceways on said slides, members on said groups, adapted to runforward and backwardon saidraceways, suitable operating meansfor. saidgroups whereby the opposed groups are caused to move forward andbackward, right and left hand threaded spindles connecting said slides,said spindles being adapted to rotate and thus to move saidgroups towardand away from each other, crank arms on said spindles, and stops on saidgroups, adapted to strike. against said crank arms in course of theforwardandbackward motion of said groups and thus to'rotate saidspindles.

4. In a conveying device comprising opposed groups of bars, a machineframe, guide pieces on said machine frame, slides engaging said guidepieces, raceways. on-said slides, rollers on said groups, adapted to runforward and backward on said raceways, suitable operating. means forsaid groups whereby the. opposed. groups are caused to move. forwardandbackward, and right and left hand threadedrotatable spindlesconnecting said slides, said spindles being adapted to be controlledbythe forward and backward motion of opposedgroups and to. move saidgroups toward and away fromeach other.

5. In a conveying devicecomprising opposed groups of bars, vazxmachineframe, guide pieces on said machine frame,.slides engaging said guidepieces,.racewayson,saidslides, rollers on said groups, adapted to runforward and backward ,on said raceways, suitable operating means forsaid groups whereby the opposed groups are caused to move forward andbackward, right and left hand threaded spindles connecting said slides,said spindles' being.adaptedto rotate and thus to move said. groupstoward and away from each other, crank. arms on said spindles, and stopsonsaid groups, adapted .to strike against said crank arms in the course.of the forward and backward motion of.said.groups and thus to rotatesaid spindles.

6. In a. conveying device comprisingopposed groups of bars, suitablesupportingmeans for said groups, adapted tomovev toward and away fromone another, a camsdiski adapted to move opposed groups forward-andbackward, and suitable driving meansconnecting the supporting meansofopposed groups, said driving means being adapted to be controlled bythe forward and backward motion of opposed groups and to more saidopposed groups toward. and away from each other.

'7. In aconveying device comprising opposed groups ofbars, suitablesupporting means for said groups,. adapted to move toward and away fromone another, a cam disk adapted to move opposed groups forward andbackward, and right and left hand threaded spindles connecting thesupporting means-of two opposed groups, said spindlesbeing. adapted tobe controlled by the forwardand backward motion ot'opposed groups- .saidslides, said spindles being adapted to be controlled by the forward andbackward motion of opposed groups and to move said groups toward andaway from each other.

9. In a conveying device comprising two pairs of opposed groups of bars,a machine frame, guide pieces on said machine frame, slides engagingsaid guide pieces, raceways on said slides, rollers on the groups ofeach pair, adapted to run forward and backward on said raceways. tworocking levers mounted on said machine frame and each pivotallyconnected to one group of a pair, two cam disks engaging said rockinglevers and being displaced in relation to each other, adapted to movethe two pairs of groups forward and backward with a mutual phasedisplacement, and right and left hand threaded spindles connecting saidslides, said spindles being adapted to rotate and thus to move opposedgroups toward and away from each other, crank arms on said spindles, andstops on said groups, adapted to strike against said crank arms in thecourse of the forward and backward motion of said groups and thus torotate said spindles.

10. In a conveying device comprising opposed groups of bars, the barslying side by side at a distance from one another which is smaller thanthe width of each bar, suitable supporting means for said groups,adapted to move toward and away from one another, suitable operatingmeans for said groups whereby two opposed groups are caused to moveforward and backward, and right and left hand threaded spindlesconnecting the supporting means of two opposed groups, said spindlesbeing adapted to be controlled by the forward and backward motion ofsaid two opposed groups and to move said two opposed groups toward andaway from each other.

GOTTFRIED MAURER.

